9mm seating depth variations
Quote from Reloader on June 19, 2016, 7:20 pmI recently set up my 9MM dies on my 650XL and have experienced a significant difference in seating depths. Fully tightened and locked in, about 80% of my bullets seat to 1.158-1.160. The other 20% seat anywhere from 1.149 to 1.176. Any clue as to what is going on? (I am using the appropriate side of the seating stem for my bullets)
I recently set up my 9MM dies on my 650XL and have experienced a significant difference in seating depths. Fully tightened and locked in, about 80% of my bullets seat to 1.158-1.160. The other 20% seat anywhere from 1.149 to 1.176. Any clue as to what is going on? (I am using the appropriate side of the seating stem for my bullets)
Quote from Reloader on July 6, 2016, 3:58 pmMy apologies for not answering this sooner. I simply failed to see it pop up.
The variation is almost always among the individual projectiles, as where the diameter that the seat stem contacts can be higher or lower from one bullet to the next. I have personally measured as much as .026" variation among one box of 100 projectiles. Round Nose bullets typically exhibit the widest variation. The variation you are seeing is normal and typical.
My apologies for not answering this sooner. I simply failed to see it pop up.
The variation is almost always among the individual projectiles, as where the diameter that the seat stem contacts can be higher or lower from one bullet to the next. I have personally measured as much as .026" variation among one box of 100 projectiles. Round Nose bullets typically exhibit the widest variation. The variation you are seeing is normal and typical.